The first time I saw this message (a few months ago soon after I started using Encore) I blissfully clicked on 'Yes'. That really messed things up so each time since I have clicked on the non-default 'No'.
I was wondering why I should be getting this dangerous (for me) message? I have an old version of Photoshop on my machine but it's a Windows version and only used inside VMWare Fusion and not too often at that. Is there something I should do to stop it appearing?